If you consider them mass-produced, Knox used left-hand steering circa 1902-04. I believe they built several thousand cars at that time. There were probably others, but Knox came to mind first. I hope this helps, Chris

I guess Knox like Ford made cars with steering wheels on either side? I saw a 1907 Knox surrey top limousine in the Nethercutt museum in the Los Angeles area in October that is R/H drive. A remarkable, large, ornate car.

More help from Google - here is a collection of Knox advertisements which indeed show that Knox mass produced cars with the controls on either side years prior to the Model T, so Ford was definitely not first.

1899 Waverley Electric was operated from the left hand side (tiller in the middle - driver sat on left and controls were on the left). There is an 1899 Waverley Electric at the Auburn Museum and another in the collection of the Indianpolis motor speedway (not currently on display).

Two 1900 Waverley Electrics are in Minnesota - one owned by the Minnesota Historical Society in St. Paul and one owned by a private collector in Minneapolis. Both are operated from the left.

I just finished reading an article about Brush automobiles. The prototype was built in 1907 and mass production started shortly thereafter, also in 1907. It appears that all had steering wheels on the left hand side, including the prototype.

According to the "Automobile Quarterly" magazine Volume 16 Number 2 and some links below, Thomas Jeffery built his first quadracycle-like car in 1897, first production prototypes in 1901, invented the clincher tire, first installed the a front-mounted engine, first used a steering wheel, and put the driver on the left in his experimental Rambler Models A & B in 1901.

Dad, Charles Jeffery told his son that it was "Too radical", the public was not ready for a front-mounted engine, left-hand drive and wheel steering; why doom the venture at the outset by indulging in the unconventional?